Situated about six miles from Colombo, set within a sacred area of around ten acres, the Kelani Vihara stands beside the Kelani river as evidence of a Buddhist tradition in this country.The spot on which this vihara stands derived its sanctity in the Buddhist era 2531, with the third visit of the Buddha to this country. He hallowed this ground by His visit accompanied by 500 Arahants.The fact that the Buddha visited the spot on a Wesak day on the invitation of King Maniakkhika is given in the historic epics of Sri Lanka.Historical evidence shows that the Kelaniya Vihara was at its highest glory during the Kotte Era.
By the time the Portuguese conquered the country considerable land had been donated by the kings to the Kelaniya Vihara, and when in 1510 the Portuguese entered and destroyed the secret temple. They had confiscated this land preventing Buddhists from worshiping at the temple.Restrictions placed on the development of Kelaniya were reduced with the advent of the Dutch. They in 1767 perhaps in order to gain King Kirthi Sri Rajasingha’s good will permitted him to develop Kelaniya Vihara. Thus the reconstruction of the Vihara was undertaken by the then Chief incumbent Venerable Mapitigama Buddharakkhita. He was provided with funds from the treasury. The King was so overjoyed at the way the work was handled that further grants of lands had been given to the vihara.